Optical filter holder



FIG. 1 is a front, top, left side perspective view of an optical filterholder showing our new design.

FIG. 2 is a rear, top, right side perspective view.

FIG. 3 is a front elevation view.

FIG. 4 is a rear elevation view.

FIG. 5 is a top plan view; the bottom plan view being a mirror image;and,

FIG. 6 is a left side elevation view, the right side elevation viewbeing a mirror image.

The broken lines shown in the drawings depict features of the opticalfilter holder that form no part of the claimed design.

CLAIM The ornamental design for an optical filter holder, as shown anddescribed.